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Finding the Fourth Proportional to 563.44, 843.64 and 318.72

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Solution

The fourth proportional to 563.44, 843.64 and 318.72 is: 477.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.44 : 843.64 = 318.72 : x
  2. Step 2: Convert to fraction form
    563.44/843.64 = 318.72/x
  3. Step 3: Cross multiply
    563.44x = 843.64 × 318.72
  4. Step 4: Simplify right side
    563.44x = 268,884.94
  5. Step 5: Solve for x
    x = 268,884.94/563.44
  6. Step 6: Final answer
    x = 477.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.